Color-photographing apparatus.



I w. H. .fiOHER-I-Y. cmoara-oiolfi nxr-wms mun-Mus. mummy: mu mm: "Jan.

Patented Dec. 5,191

a satns-suzn 2 grit-.

WITNESSES Ame/15x3 Emmi nonmi'rr; or errannes'rowiw, mssacH-usn ns.

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T all whom it may concern:

Be it known that I, VlLLlA M H. Domzmfr, a citizen of the United States, and a resident of Charlestow'n, in the county of. Suffolk and State of llfassachusctts, have invented certain new and useful Improvements in Color-Photographing Apparatus, of 'which the following s a specification.

My present invention relates to camerasand is an improvement over that form shown and described in my application for Letters Patent, filed April 2, 1913, Serial No. 758,328, allowed March 2, 1914, in that, while being an apparatus for color photography, the present form provides for either two plates in focal plane, or three plates, of different color screen results, and, further, that in this present form I arrange the plates when two'in number in one for l plane 105 (ratedin the conventional position or, when three in number, in anothcrf'ocal plane also located conventionally in the rear of the camera.- I i p A further object is to-provideprisms having two reflecting surfaces, each, instead of but oneasin the forms mentioned, to admit. of the reflection of the rays of light to the conven ionally located focal plane, orpla-nes. Atari-her object is to provide suitable 0 prism operating means, either manual or ower driven, whereby each of said prisms is carried into light reflecting position, with respect to the objective lens, for corresponding plates in the corresponding focal plane. A further object is to provide means for making the prism operation continuous as for moving picture cameras, or merely' for. passing the prisms. once, each, across the direct path of light rays, as for single e'xposure'c-ameras. Y 1 f i A further object is to provide removable frames having, each, the-desired number of sensitized plate holders, in focal planes, and 7 also carrying color screens, and light obstacles.

A; further object is to froiide a shield, either movable or otherwiu on each prism to intercept direct rays at, desired periods of prism movement, and al-so. to prerenti interiorly reflected rays from passing through the same, the shields, when movable, being operable b suitable means presided at desired-positions of the prisms. I

A further object is to provide one form of prism, if desired, a liquid or other omaammmma arenas-'15s.

Im ora in we" ramt.

raw-tea Bees, 1916. i

Application altar-um 17,1914. Seda1'1vo.845,580.

I screen ortfilte-r arranged between trworeflecting elexnents, thus dispensing with the screens in the positions of, the sensitized plates ,4 and -further objects are to make such cameras which are simple in construction and use, fully ellicient, well adapted to the purpose for which thev are designed, and comparativelyinexpensive.

My invention is fully described in the following specification, of which the a ccompanying rlrawing's form a art, in which the same parts are-designated y the same reference characters in each of'the views, and in which Figure 1 is a section through one form of IO cameraembodying my invention, 0 the line XX of Fig. 2, but showing one of the prisms-which I employ in full lines for the purpose of showing the moving means there- 1 for; Fig. 2 is a section taken on the line '--Y of Fig. 1, with parts broken away toi show 'prismcontrol means; and Fig. 3 is a sectional plan View of a modification.

In Figs. 1 and 2 I have shown a casing 10,

' the usual bellows 11, and lens 12,and'80 grooves 13 for a plate-holder, not shown, arranged in the focal plane of the casingsaid groor-es being arranged in a frame 14 adapted for removal from the casing, and said frar'ne also carries two light obstructing ar titions 15 and 16 dividing the plate-ho der space into three sections 17, '18 and 19, each g i of which has a color screen -20, 21 and '22, respectively, adjacent he focal plane, and

said f-rmn'enl'so' car.- cs two chromatic corill I rected lenses 23 an 2, and it will be-n-oted that the partitions 1"?) and 16 project. into the casing a material v'r"r r.-.tam:e beyond the lenses a 23 and 24 toj'p-revent direct ra-ys'through the objective lens "12 from reaching the lenses 5 23 and 24.

jacent the hellows ll, one on. either side thereof, the formercf which has a. bevel' gear'Q'Z at a slight distance beloiv its upper 10!! menu-i or other reflecting ma -SW11, m;

I provide two verticalshaiits 25 .and26 ed? '2,- 5

' is produced within a support 48; this oint "driving means 49 and 50', respectively, spring shafts and. 46, respectively, Fig. 2, the

last named gears being in screw th readed en g'agement' with their respective shafts, and said shafts'nre each flattened at their inner ends as shown at 47, whereby a sliding joint insures the complemental: rotation o-f the shafts and also permits longitudinal movement. of said shafts with respect to each other;the shafts 45 and 46 are provided with a. motor as shown, but which may be manual, through the medium of pinions 49 and 50 the said shaft as shown, by a coil-spring backed by a collar 56 secured to said shaft,

in which the respective shafts are sli'dable but not rotatable;

The gear 43 is -reroluble in a sup art 51- held on a. flooring 52 and carries a riction disk 53 adapted to be engaged by a similar disk 54 slidably keyed on the shaft 45-and held in such engagement, in the pos tion of and it will seen that, if the shaft 45 be rotated in the direction of the arrow, the screw-thread thereon moves said shaft longitudinally toward the shaft 46, thus releasing the tension between the friction disks 53 and 54 and no motion is transmitted by the shaft 45 to the gear 43 but, if the fricl tion disks bear upon each other, as shown, the gear .43 is. revolved, as is also the gear 41, rotatingthe shaft 25 and revolving the gears 27 and '29 to rotate the worm 31 and thus movethe prism 34 rearwardly and diagonally of the casing 10.

The gear 44 is revolubie in a support 57 on the flooring 52 and carries a friction disk 58 against. which afriction'disk 59. is adapted to bear, said latter disk being keyed on,

the said shaft 46 andnormally-forced in the dliCtlOTl, of the disk 58 by means of a'coilspring 60 backed by a collar 61 on said shaft,

and rotation of theshaft 46' in the last descr bed direction of the shaft 45 moves the shaft 46 inward-lyof the casing and carries the disk 59 toward the dish 53,130 lock said disks together. 7

From theposition of the parts "shown in Figs. 1 and 2, izfithe shaft 45 be rotated in the direction of the" arrow, the gears 43, 41,

- .27 and .219 are revolved because of the frie tion disk engagement of this shaft, andthe prism 34 isthus carried inwardly and rearwardly, through the direct rays of light from the lens 12 and, when said prism is in such positionthat the upper end thereof is in the direct, range of said rays, the rays of light are reflected from one reflecting surface to.- the other'and thence-to the vsectiiorl .-l9, through-the corre'otinglens '24 and the color screen 22, and thesensitized' plate at such point is exposed, the outer's'urface of the interiorly reflecting metallic or .oiherele-ments being opaque andfse'rve as light obstacles in the initial pes'ition'sh'own ofea-chj When the prism 34 has reached its inviard limit of movement, the gear 43"cann0 longer revolve in this di'rection, and the screw thread'on the shaft 45' moves said shaft inwardly, thus reduci-ngand eventually preventing the action of the coilspring on the friction disk 54 and the rotation of said shaft similarly rotates the shaft 46, the movement of which, because of the screwthrcad thereon, bein also inwardly of the casing, until the friction disk 59 engages the friction disk 58 to revolve the gear 44, thus revolving the gears 42, 28 and 30, and rotatingthe worm shaft32 to carry thepri'sm 36 forwardly and diagonally to c'rossthe direct path of the rays of light from the lens 5 12, said -'r'ays being reflected to the sensi; tized plate inthc section 17 through-the cor+ recting=le1is23 and color screen 20, and this plate is exposed.

When one prism has passed to its limit of movement and just beiore the other begins its movement, the direct rays from the ens 12 passth rough the vcolor screen 21 to the plate 18 which is then exposed, the interval existing between the obstructing ofthe lightby the non-reflecting exteriors-of the prisms,

is calculated, and is g-aged, to a degree, by the speed of rotation of the driving shaft,

but this is a constructive detail and subject i to modification.

As clearly shown inFigs. 1 and 2; I pro 1 vi'de an opaque screen 62 on each of the prisms 34 and 36, and hinged thereto,-the

outer ends, 63, of which are adapted to engage with a fixed pin 64 in the casing 10 to swing'the corresponding screens .on. their hinges to shut off the direct rays zfronithe central portion of the sensitizedplate in the compartment 18, to permit [a longer ea osure for the corresponding edges thereof, and these screens may :be made of'any desired size, shape mar-material.- g

It will thus :be seen that, inlonc direction of driving shaft movement, one prism/is carried across the path-of direct rafi's of light I and then the other, each reflecting-the rays of light to a correspondin-gsensit zed.plate, and an interval occurring1in which a third.

plate is exposed, said plates being nori'nailyprotected from the light, and, when-such exposure has been made, new'plates-may be substituted for those exposed an-d'theadireetion of shaft morement reversed to expose the same, in the return of the prisms to their 7 initial position-s.

, Fig, 3 s sho'ivna ifi'irth ermodi-fication of'the 'PII'SIH operating means; a

v the pins thereof arein' the parallel portions of the slot but more inwardly or outwardly when the inclined portions of said 'sloten 'ismiafT 1 P j revolnble cone 79 within which are the and bottom, guide plates, only one of which is *s'hownand which is slotted at 80 for the pins 81 of the prisms; a crank-handle 82 is connected with said cone by means of a train gagethe pins, but I do not confine myself to any specific details. in connection with this form.

In Fig. 3 is also illustrated a feature.

' which I may use in any of the forms, and

relates to the focal plane 0: planes of the camera; I provide a removable frame 8-1 as a substitute for the frame 14 already described, and' comp-rises but two sections 85 and 86 separated by a partition 8-? arranged 'on the axisof the objective lens,1 2, thereby providing two'places for two plate-holders having sensitized 'platestherein and adapted I to be alternately exposed by the light reflected through the corresponding prisms, this frame being employed with wide-angle lenses, preferably, and permitting two picture's equaling the dimensions of the three exposed in the frame 14, the partition 87 I hloek -ngthe passage of light through either prism to the plate not to be exposed therethrough.

It will t-hus'be that I ma direetrays of lightflto any of three foes planes, by means of double refl'eeting prisms movable, each, into the path of the direct rays of light through the objective lens, and oppo- "-si'te'ly arra n'ged to direct the reflect-ed raysaltemately'to sides opposite the focal plane of the direct rays, thus inaki'ng three exposures through correspondingeolor screens, and which screens. may be located adja-e'entthe sensitized plates, or may be carried by the respective prisms, as a part-thereof.

I claima 1. A camera, comprising a. casing, a lens, a plurality of light refiecting elernents, and x'neans for slidin across the axis 0? said? lens to "direct ight rays to different portions of a plane perpendi'cular co/the axis of said lens.

2. A camera. com risin a casin a lens a plurality of light reflecting elements,- and means for sliding said elementsoblique'ly at difi'er'ent-p'ezriods across the-axis er said lensto'rlirect light; rays to difi'ere'nt portionsof a' plane perpendicular to the axis of's'aid' lens. 3. 'A camera,-comp rising a casing, a. lens,

said elements .obli uely" a plurality of light reflecting elements, and

means for sliding-said elements obliquely at different period's across the axis of said lens with an interval.therebetween. to direct light rays to different portions of a plan-e aml-t'oexpose-another portion of said plane to, directlight rays from said lens.

In testimony whereof I have signed my name to this specification in the presence of the subscribing witnesses; I

WILLIA} HENRY DDHERTY. Witnesses:

WILLIAM P. SULLIVAN. 

